Vulnerability · Published Jul 20, 2025 · Assigned by VulDB

CVE-2025-7911D-Link DI-8100 jhttpd upnp_ctrl.asp sprintf stack-based overflow

High 8.8

In plain English

A high-severity stack buffer overflow in DI-8100 from D-Link. Proof-of-concept exploit code is public. The chance it is exploited in the next 30 days is estimated at 2.0% (higher than 81% of all known vulnerabilities).

Severity (CVSS 3.1)8.8High

Exploit odds (30 days)2.0%top 18.9% of all CVEs

Exploited in the wildNo reportsCISA SSVC: poc

Attack toolingNoneno public tooling known

Official description

A vulnerability classified as critical was found in D-Link DI-8100 1.0. This vulnerability affects the function sprintf of the file /upnp_ctrl.asp of the component jhttpd. The manipulation of the argument remove_ext_proto/remove_ext_port leads to stack-based buffer overflow. The attack can be initiated remotely. The exploit has been disclosed to the public and may be used.

Affected products (as reported)

Vendor	Product	Versions
D-Link	DI-8100	1.0

Weakness: CWE-121, CWE-119 · Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:P/RL:X/RC:R

References

VDB-317026 | D-Link DI-8100 jhttpd upnp_ctrl.asp sprintf stack-based overflow vdb-entry, technical-description
VDB-317026 | CTI Indicators (IOB, IOC, IOA) signature, permissions-required
Submit #618640 | D-Link DI-8100 V1.0 buf third-party-advisory
Submit #618641 | D-Link DI-8100 V1.0 Buffer Overflow (Duplicate) third-party-advisory
https://github.com/buobo/bo-s-CVE/blob/main/DI-8100/upnp_ctrl_asp.md exploit
https://www.dlink.com/ product